At the ENVISAT symposium 2007 in Montreux a poster is presented with goals and status of ADAGUC
ADAGUC at EGU General Assembly 2007 in Vienna
Goals and current status of ADAGUC will be presented in an oral presentation
ADAGUC at National Geo Information Days in Rotterdam
ADAGUC presented 2 posters to the Dutch Geoinformation community in the former van Nelle factory in Rotterdam.
ADAGUC success in Geo-Connected
ADAGUC will receive an additional grant for a top-up project, dealing with climate and forecast data. The Geo-Connected tender has been issued by RGI to establish bridges between research programs.
Presentations workshop 2006 online
The presentations of the ADAGUC workshop are now online. You can access them
GOME Total Ozone (TOGOMI)
1.1. Product description
total ozone column is retrieved from GOME observations with an
algorithm based on the Differential Optical Absorption Spectroscopy
(DOAS) method. The TOGOMI algorithm consists of three steps. First,
the reference differential absorption spectrum of ozone is fitted to
the measured Earth radiance spectrum and solar irradiance spectrum,
to obtain the slant column density. In the second step the slant
column density is translated into the vertical column density using
the so-called air mass factor (AMF). The third step consists of a
correction for the screening of ozone below clouds.
the concentrations of stratospheric ozone.
total ozone is used for improving numerical weather forecasts,
monitoring the ozone hole, studying climate change and for other
1.2. Time period of content
1.2.1. Time period of content
April 1996 – 26 May 2008.
1.2.2. Currentness reference
Actual time of observation.
1.3.2. Maintenance and update
1.4. Spatial Domain
1.4.1. Bounding coordinates
coverage: Longitude [-180,180], latitude [-90.,90.]
1.6. Access constraints
1.7. Use constraints
1.8. Point of contact
Ronald van der A, KNMI, firstname.lastname@example.org
1.9.2. Publication date
Figure 1. Total ozone distribution on 17 March 2003 as
measured with the GOME instrument.
1.11. Data set credit
Pieter Valks, Roeland van Oss (KNMI).
1.12. Cross reference
and OMI ozone information (http://www.temis.nl).
Valks, P.J.M., R.B.A. Koelemeijer, M. van Weele,
P. van Velthoven, J.P.F. Fortuin en H. Kelder, Variability in
tropical tropospheric ozone: Analysis with Global Ozone Monitoring
Experiment observations and a global model, J. Geophys. Res., 2003,
108, 4328, doi:10.1029/2002JD002894.
2. Data Quality
2.1.1. Source information
1 data (measured spectra) of GOME.
184.108.40.206. Source citation
2.1.2. Processing steps
220.127.116.11. Processing description
The TOGOMI algorithm consists of three steps.
First, the reference differential absorption spectrum of ozone is
fitted to the measured Earth radiance spectrum and solar irradiance
spectrum, to obtain the slant column density. In the second step the
slant column density is translated into the vertical column density
using the so-called air mass factor (AMF). The third step consists of
a correction for the screening of ozone below clouds.
18.104.22.168. Algorithms used
algorithm (Fortran code).
22.214.171.124. Ancillary data
climatology, effective temperature.
126.96.36.199. Processing date
188.8.131.52. Data validation
error is less than 1 %, except for latitudes below 60° South,
where the error is less than 4 %.